Results 251 to 260 of about 305,947 (290)

Cascade pseudomultibit noise shaping modulators

IEE Proceedings G Circuits, Devices and Systems, 1993
Cascade and multibit quantisation 1-bit feedback (NA/D1) noise shaping modulators are presently considered the most attractive topologies for implementing high resolution A/D convertors. This is because the cascade concept allows stable high order noise shaping modulators to be implemented easily, and because the NA/D1 architecture allows the amount of
V.F. Dias, V. Liberali
openaire   +1 more source

Noise-Shaping Cyclic ADC Architecture

Key Engineering Materials, 2015
This paper presents an ADC architecture comprising a pipelined cyclic ADC and continuous-time delta-sigma ADC; it provides high resolution at medium speed, with small power requirements. It is also reconfigurable for different combinations of speed, precision, and power consumption.
Yukiko Arai, Yu Liu, Haruo Kobayashi, Tatsuji Matsuura, Osamu Kobayashi   +4 more
openaire   +1 more source

Noise-shaping coding

1994
In this chapter noise-shaping techniques to improve the dynamic range of a system will be described. Noise-shaping can be very useful when speed can be exchanged with accuracy. The quantization errors in a noise-shaping system are removed from the signal band of interest. Mostly the suppressed quantization errors appear enlarged as out-of-band noise in
openaire   +1 more source

Oversampling and Noise Shaping

2000
Analog-to-digital and digital-to-analog conversion are important functions that greatly determine the quality of the signal processing chain. We showed in Chap. 4 that a certain effort is required for filtering in the continuous-time domain in order to avoid errors in the transition process from the analog to the discrete-time world and vice versa. The
openaire   +1 more source

Design of multibit noise-shaping data converters

Analog Integrated Circuits and Signal Processing, 1993
A synthesis methodology for selecting locations of thez-domain poles for noise-shaping coders that use multibit internal converters is presented. A key aspect of the proposed methodology is the use of the |L|1 norm of the noise transfer function to guarantee stability rather than the power gain or |L|2 norm which is commonly used in the design of 1-bit
John G. Kenney, L. Richard Carley
openaire   +1 more source

WAVELET SHAPING AND NOISE REDUCTION *

Geophysical Prospecting, 1974
AbstractApproximate deconvolution by means of Wiener filters has become standard practice in seismic data‐processing. It is well‐known that addition of a certain percentage of noise energy to the autocorrelation of the signal wavelet leads to a filter that does not increase, or even reduces, the noise level on the seismogram.
openaire   +1 more source

Residual noise shaping technique for active noise control systems

The Journal of the Acoustical Society of America, 1994
An active noise control system attenuates the overall sound field. However, in some applications, it is desirable to change the spectral contents of the residual noise. In this Letter, a residual noise spectrum shaping technique based on the filtered-E least-mean-square algorithm has been developed. This technique can be applied to active noise control
Sen M. Kuo, Jianming Tsai
openaire   +1 more source

On psychoacoustic noise shaping for audio requantization

2003 International Conference on Multimedia and Expo. ICME '03. Proceedings (Cat. No.03TH8698), 2003
Summary form only given. Signal requantization to reduce the word-length of an audio stream introduces distortions. Noise shaping can be applied in combination with a psychoacoustic model in order to make requantization distortions minimally audible. The psychoacoustically optimal noise shaping curve depends on the time-varying characteristics of the ...
De Koning, Dreten, Verhelst, Werner
openaire   +4 more sources

Measurement of telephone noise and power wave shape

Electrical Engineering, 1935
Since the original introduction of devices for measuring or rating the wave shape of power system currents and voltages in terms of their influence on exposed telephone circuits, much additional work on this problem has been done, the results of this work are reported in this paper.
J. M. Barstow, P. W. Blye, H. E. Kent
openaire   +1 more source

Auditory filter shapes derived with noise stimuli

The Journal of the Acoustical Society of America, 1976
A wide-band noise having a deep notch with sharp edges was used to mask a tone. The notch was centered on the tone, and threshold was measured as the width of the notch was increased from 0.0 to 0.8 times the tone frequency (0.5, 1.0, or 2.0 kHz). The spectrum level of the noise was 40 dB SPL.
openaire   +2 more sources